Cited by 279Evolution and Genetic DynamicsGenomics and Rare DiseasesGenetic Associations and Epidemiology

The deleterious mutation load is insensitive to recent population history.

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Simons, Yuval B, Turchin, Michael C, Pritchard, Jonathan K, Sella, Guy·2014·Nature Genetics

Abstract

Human populations have undergone major changes in population size in the past 100,000 years, including recent rapid growth. How these demographic events have affected the burden of deleterious mutations in individuals and the frequencies of disease mutations in populations remains unclear. We use population genetic models to show that recent human demography has probably had little impact on the average burden of deleterious mutations. This prediction is supported by two exome sequence data sets showing that individuals of west African and European ancestry carry very similar burdens of damaging mutations. We further show that for many diseases, rare alleles are unlikely to contribute a large fraction of the heritable variation, and therefore the impact of recent growth is likely to be modest. However, for those diseases that have a direct impact on fitness, strongly deleterious rare mutations probably do have an important role, and recent growth will have increased their impact.

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  • In a population with larger Ne, the efficacy of purifying selection against recessive alleles increases proportional to Ne^1/2, but mutational input increases proportional to Ne, so at equilibrium an individual in a larger-Ne population has a greater expected number of recessive lethal mutations.

    “In a population with larger N e, the efficacy of purifying selection against recessive alleles increases (proportional to N e 1 = 2 ), but the increase in the mutational input (proportional to N e) is greater than the increase in the efficacy of selection (Simons et al. 2014). Therefore, at equilibrium, an individual in a population with larger N e will have a greater expected number of recessive”

    From An Estimate of the Average Number of Recessive Lethal Mutations Carried by Humans (2015) · cites this paper as Simons et al. 2014

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  • A related computation of the overall influence of natural selection in human history, relying on measures of selection against deleterious variants rather than directional selection of favorable variants, does not suggest strong systematic differences in the magnitude of selection among different continental population groups.

    “However, a related computation of the overall influence of natural selection in human history, relying on measures of selection against deleterious variants rather than directional selection of favorable variants, does not suggest strong systematic differences in the magnitude of selection among different continental population groups [50–52]”

    From Interpreting polygenic scores, polygenic adaptation, and human phenotypic differences (2019) · cites this paper as [51]

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Authors
Simons, Y. B., Turchin, M. C., Pritchard, J. K., & Sella, G.
Affiliations
  • Hebrew University of Jerusalem (IL)
  • University of Chicago (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
  • Pritchard, Jonathan K
  • Sella, Guy
Venue
Nature Genetics
Published
2014-02-09
Volume
46
Issue
3
Pages
220-224
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W1994975196
Cited by
279
References
30
Citations by year
2026: 8 · 2025: 15 · 2024: 12 · 2023: 17 · 2022: 16 · 2021: 26 · 2020: 12 · 2019: 26 · 2018: 34 · 2017: 26 · 2016: 28 · 2015: 34 · 2014: 20 · 2013: 5
FWCI
23.64
Type
journal article
Language
en
Open access
Locations
  • Nature Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health
  • National Institute of Mental Health (R01MH084703, MH084703)
  • National Institute of General Medical Sciences (R01GM083228, GM083228, T32GM007197)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
Keywords
deleterious mutation load, population growth, population size change, exome sequencing, pathogenic variants, rare alleles, heritable variation, fitness effects of mutations, West African ancestry, European ancestry, population genetic models
MeSH terms
Genetics, Population, Humans, Models, Genetic, Mutation, Population Dynamics, Polymorphism, Single Nucleotide, Genetic Load, Black People, White People, Exome

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